#define _CRT_SECURE_NO_WARNINGS
#include"Date.h"

Date::Date(int year, int month, int day)
{
	_year = year;
	_month = month;
	_day = day;
}

void Date::Print()
{
	cout << _year << "-" << _month << "-" << _day << endl;
}


Date& Date::operator+=(int day)
{
	_day += day;
	while (_day > GetMonthDay(_year, _month))
	{
		_day -= GetMonthDay(_year, _month);
		++_month;
		if (_month == 13)
		{
			++_year;
			_month = 1;
		}
	}
	return *this;
}

Date Date::operator+(int day)
{
	Date tmp = *this;
	tmp += day;

	return *this;
}

//Date& Date::operator-=(int day)
//{
//	_day -= day;
//	while (_day <= 0)
//	{
//		--_month;
//		if (_month == 0)
//		{
//			_month = 12;
//			--_year;
//		}
//
//		_day += GetMonthDay(_year, _month);
//	}
//
//	return *this;
//}

//Date Date::operator-(int day)
//{
//	Date tmp = *this;
//	tmp -= day;
//
//	return tmp;
//}

Date Date::operator-(int day)
{
	Date tmp = *this;

	tmp._day -= day;
	while (tmp._day <= 0)
	{
		--tmp._month;
		if (tmp._month == 0)
		{
			tmp._month = 12;
			--tmp._year;
		}

		tmp._day += GetMonthDay(tmp._year, tmp._month);
	}
	return tmp;
}

Date& Date::operator-=(int day)
{
	*this = *this - day;

	return *this;
}